The total length of the backer is 500mm, the total width is 68mm, the total height is 60mm (excluding the height of the dust baffle nut 40mm), the standard opening is 40mm (the opening can be closed), the inner diameter of the dust suction interface is 32mm, the center distance between the two chutes is 330mm, the length of the two chutes is 300mm, the width of the chute is 30mm, and the thickness is 12.7mm
